Many applications for Dura-Bar end up having a hole machined through the center. Often this is one of the longer machining steps. To help speed up the machining process, Dura-Bar offers trepanned tubes from a variety of round bar stock sizes to meet a wide range of customer tubing applications.
The Dura-Bar trepanning process and modern equipment assures customers of the most precise and accurate trepanned products to meet exact specifications. All tubes are left with sufficient stock for clean-up in most applications.
Many trepanned sizes are available from stock, and additional sizes can be custom ordered.
| Nominal O.D. | Minimum Wall Thickness |
|---|---|
| 0.000" - 3.000" | 0.562" |
| 3.001" - 6.000" | 0.625" |
| 6.001" - 12.000" | 0.687" |
| 12.001" - 16.000" | 0.750" |
Wall thickness minimums are based on actual O.D. and I.D. A customer requiring a 3.00" O.D. x 2.00" I.D. tube will receive a tube which is 3.110" O.D. x 1.750" I.D.
| Example | 3.000" as-cast x 2.000" I.D. |
|---|---|
| Actual | 3.110" O.D. x 1.750" I.D. |
| Single wall thickness | 1.360" / 2 = 0.680" |
